On the Stability of Electroweak Strings (New Version)

M. James, L. Perivolaropoulos, T. Vachaspati

We map the parameter space that leads to stable Z-vortices in the electroweak model. For $si{n}^2{\theta }_W=0.23$, we find that the strings are unstable for a Higgs mass larger than 24 G…